R32 Gtr Stock Performance

[LoNgStAr]

Hey guys,

I have a quick question, My r32 is stock and i feel like theres lag in the turbo.

I've heard from people they said that there should be no turbo lag since its a twin turbo because it uses 1 at lower revs and 1 at higher revs.

When i do test my car, i think the turbo kicks in around 3000rpm (thats when i feel the power :|).

By the way im not a reckless driver and normally dont speed, so im not too sure if this is normal for my car or could it be some problem with the turbo? could it be the set up? or some electric problem?

Please help me settle this problem.

Cheers guys!

[Primordial]

About 3000rpm sounds about right for a stock GTR to come on boost..

[N1GTR]

Yep around 3k is where it starts to happen

[jantolis]

I've heard from people they said that there should be no turbo lag since its a twin turbo because it uses 1 at lower revs and 1 at higher revs.

Not in a gtr.

[R33GTRKid]

you are thinking about a sequential turbo set up like in a liberty, GTR's turbos run simultaneously, one feeds off exhaust from front three cylinders, the other off the three back cylinders, their charge is joined prior to entry through the intercooler, then into plenum, and fed into cylinders to mix and explode with ya go go gas

[eeiko321]

"The engine also uses a parallel twin turbo system. The turbo system is arranged so that the front turbo is powered by the front 3 cylinders, and the rear turbo is powered by the rear 3 cylinders. The turbo chargers are of equal size, and are set by the wastegates to limit boost pressure to 14.7 psi, although the Skyline GT-R has a built in boost restrictor to keep boost under 10 psi."

yeah 3 - 3,500rpm usually is when you start to see the light at the end of the tunnel!!!

[N1GTR]

I've heard from people they said that there should be no turbo lag since its a twin turbo because it uses 1 at lower revs and 1 at higher revs.

Stop taking their advice - they're wrong

Supra's also have sequential turbos (and they are shit) FYI

[LoNgStAr]

thanks alot guys, just making sure that my car is normal. People sometimes make me worry by saying stuff that is not true! you guys are great!!

cheers!

Edited March 10, 2009 by LoNgStAr

[Primordial]

A great way to combat that pesky sluggish period below 3000rpm is to rev the car to 4-5000rpm and dump the clutch

On a more serious note.. Definition of "Turbo Lag": Within a turbocharger's operating range (ie. in your case about 3000-7000rpm), lag is the delay between the instant a car's accelerator is depressed and the time the turbocharged engine develops a large fraction of the power available at that point in the engine's power curve.

Below 3000rpm the engine doesnt flow enough exhaust gas to spin the turbine fast enough to make boost. So what you're experiencing isnt actually "turbo lag" by definition

[N1GTR]

You'll be suprised how much nicer they act at 15psi

But yeah they're pretty crappy turbos, and the ceramic wheels are dodgy as all hell. I doubt you'll find anyone on here who wouldnt recommend changing them as soon as the budget allows The most responsive direct replacements are HKS GTSS, or Garrett 2860-7's for the budget minded.

Enjoy!

[Jez13]

You'll be suprised how much nicer they act at 15psi

But yeah they're pretty crappy turbos, and the ceramic wheels are dodgy as all hell. I doubt you'll find anyone on here who wouldnt recommend changing them as soon as the budget allows The most responsive direct replacements are HKS GTSS, or Garrett 2860-7's for the budget minded.

Enjoy!

This quote is true, chuck on new turbos asap. When those turbo's go bang, which may be in the not too distant future, the ceramic dust stuffs your engine. I have N1's in mine (all steel), i think they are the same size as the stock ones and they are heppy to sit on 1.2 bar. Good Luck!

[Parag0n]

GTR system is definately not a sequential turbo setup. Easy way to check how your boost is going is go buy a $40 boost gauge and see whats happening, you could have a vac leak or one of your actuators playing up or even worse a turbo problem.

If you need to replace them get some HKS 2510/30/40's great turbos.